Learning term
Test coverage — Builds, tests, and releases
Test coverage measures which code paths a test run executes but does not prove correctness. This card shows its role in “Builds, tests, and releases” and a safe diagnostic path.
Orientation
Test coverage measures which code paths a test run executes but does not prove correctness. At this level, separate purpose, input, and visible result. Place Test coverage within Builds, tests, and releases before changing settings or files.
Practical use
A new artifact behaves differently from the previous build. For Test coverage, inspect source revision, lockfile, build log, test results, and checksum; rebuild in a clean environment and compare before release. Start in a sandbox with neutral examples. Record the expected state, make one controlled change, and compare status output, application behavior, and logs.
Technical understanding
Test coverage measures which code paths a test run executes but does not prove correctness. Technically, Test coverage connects through interfaces, configuration, state, or dependencies. Trace data from input to output and check versions, permissions, networking, storage, and resources separately.
Operations and debugging
A new artifact behaves differently from the previous build. For Test coverage, inspect source revision, lockfile, build log, test results, and checksum; rebuild in a clean environment and compare before release. In production-like operations, use measurable signals, least privilege, reproducible configuration, and a documented rollback. Preserve evidence, isolate the cause, and verify the correction with the same test.
Exercise
Try it safely
A new artifact behaves differently from the previous build. For Test coverage, inspect source revision, lockfile, build log, test results, and checksum; rebuild in a clean environment and compare before release. Open an isolated test environment and run “git status --short && git log -1 --oneline”. Write down the expected output first, do not alter production data, and record one safe next diagnostic step.
git status --short && git log -1 --onelineQuick check
Can you explain the purpose, observable state, and most common failure source of Test coverage — Builds, tests, and releases in one sentence each? Which evidence would you preserve before changing anything, and which repeated test would prove that the correction actually worked?